Hello, Some months ago, I ask the same question to FCC. Their answer was very clear !! As there is no standard allowing the use of an anechoic chamber for now, you cannot use it to perform test for FCC certification. We use our anechoic chamber to identify the frequencies from the product under test, AND we perform final measurements on our OATS. This process is fully accepted by FCC.
Regards, Pierre SELVA -----Original Message----- From: Colgan, Chris <chris.col...@tagmclarenaudio.com> To: 'ron_cher...@densolabs.com' <ron_cher...@densolabs.com>; emc-p...@majordomo.ieee.org <emc-p...@majordomo.ieee.org> List-Post: emc-pstc@listserv.ieee.org Date: Wednesday, November 24, 1999 10:54 AM Subject: RE: FCC part 15 class B, testing > > >Hi Ron > >I don't know if the FCC will accept measurements taken is an anechoic >chamber but..... > >If you want to make some meaningful measurements in a chamber you have to >make sure it is truly anechoic, you do not want any reflected waves. You >should have the chamber validated to show that the chamber normalised site >transmission loss is within +/-4dB of free space. > >As a consequence of the chamber being anechoic, you do not vary the height >of the receiving antenna as there is no reflected wave from the ground. The >antenna height will correspond to the centre of your calibrated "test >volume". You have to remember that the measurements will be 6dB lower than >those taken at an OATS because of the missing ground reflection, you should >adjust your limits accordingly. > >The standard EN50147-2:1997 "Anechoic chambers. Alternative site >suitability with respect to site attenuation" explains everything in >detail. > >Regards > >Chris Colgan >EMC & Safety >TAG McLaren Audio Ltd > >mailto:chris.col...@tagmclarenaudio.com > > > > >> -----Original Message----- >> From: ron_cher...@densolabs.com [SMTP:ron_cher...@densolabs.com] >> Sent: 23 November 1999 18:30 >> To: emc-p...@majordomo.ieee.org >> Subject: FCC part 15 class B, testing >> >> >> I would like to know if I can take compliance data for FCC part 15 class B >> in an anechoic chamber if I can't >> vary the receive antenna from 1 to 4 metres?? (The chamber is not tall >> enough) Or do I need an OATS or GTEM? >> I would also like to do FCC parts 22 and 24 on AMPS and PCS phones. Any >> information would be appreciated. >> >> >> >> >> >> Ron Chernus, Associate Test Engineer, DVT >> Denso International >> Carlsbad, California, USA >> >> >> >> --------- >> This message is coming from the emc-pstc discussion list. >> To cancel your subscription, send mail to majord...@ieee.org >> with the single line: "unsubscribe emc-pstc" (without the >> quotes). For help, send mail to ed.pr...@cubic.com, >> jim_bac...@monarch.com, ri...@sdd.hp.com, or >> roger.volgst...@compaq.com (the list administrators). >> >===================================================== >Authorised on 11/24/99 at 09:49:33; code 37f48bf3FC50C35A. >The contents of this E-mail are confidential and for the exclusive use of the intended recipient. >If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. > >TAG McLaren Audio Ltd, The Summit, 11 Latham Road >Huntingdon, Cambs, PE18 6ZU >Telephone : 01480 415600 (+44 1480 415600) >Facsimile : 01480 52159 (+44 1480 52159) > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to majord...@ieee.org >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to ed.pr...@cubic.com, >jim_bac...@monarch.com, ri...@sdd.hp.com, or >roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
